Drugs that change perceptions without sensory stimulus are
A. Hallucinogens
B. Psychedelic
C. Psychotogenic
D. All of the above

Hint:A drug is a substance that can cause a change in an organism’s physiology or psychological character. The sensory stimulus can be defined as an event or an object that is received by sense and it gives a response corresponding to the sense.

Complete Answer:
Drugs are important because they can be used to treat a number of diseases and problems. Most important drugs include Penicillin, Insulin and Aspirin. They are used as antibiotics against bacterias, used in the treatment of diabetes and can also be used as painkillers. Along with the positive effects of drugs, there are many side effects involved. They may include the overuse of it may lead to constipation, diarrhea, dizziness, headache and insomnia. In some cases, the person who consumes the drug for prolonged periods may become addicted to it.
1. Hallucinogens - Hallucinogens contain a large number of drugs that have the capacity to alter a person’s awareness of their surroundings and also their own thought. Some of the hallucinogens are extracted from plants and mushrooms.
2. Psychedelics - They also come under the class of hallucinogens, whose primary job is to trigger non-ordinary states of consciousness. This may cause specific psychological, visual and auditory changes.
3. Psychotogenic- These drugs cause psychotogenic effects. It also has the capacity to cause hallucinations. These produce symptoms similar to that of a psychosis. These drugs have a psychomimetic effect.
Thus, the right option is D.

Note: Some of the natural hallucinogens include lysergic acid diethylamide (LAD) and Psilocybin and some artificial hallucinogens include methylenedioxy methamphetamine.